Saving Tamaki's life isn't the only thing that Takuma did with that incantation. That red light was the proof of a contract. A contract with a beast god. A child of the vermilion bird, the phoenix beast god clan. And she's not here for the reason they expect. She's not what they expect, and not what anyone expects. I do not own Hiiro no Kakera. This is mostly canon, with MahiroxOC.

When the Asahina household is robbed in the middle of the night, each of the brothers have their own respective way of dealing with him. Basically presenting the first rule in crime: don't rob unless you know you can escape from a mob.